mirror of https://github.com/pulumi/pulumi.git
70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
// Copyright 2016-2022, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package myers
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import (
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"strings"
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"testing"
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"github.com/hexops/gotextdiff"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"pgregory.net/rapid"
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)
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func TestBasicEdits(t *testing.T) {
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olds := strings.Repeat("x", 20)
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news := strings.Repeat("x", 15) + strings.Repeat("y", 5)
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edits, err := MyersComputeEdits(strings.NewReader(olds), strings.NewReader(news), 4)
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require.NoError(t, err)
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editSize := 0
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for _, e := range edits {
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editSize += len(e.NewText)
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}
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t.Logf("editSize: %v", editSize)
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assert.Less(t, editSize, len(news))
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}
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func TestLargeInserts(t *testing.T) {
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olds := strings.Repeat("x", 40)
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news := strings.Repeat("x", 15) + strings.Repeat("y", 20) + strings.Repeat("x", 100)
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edits, err := MyersComputeEdits(strings.NewReader(olds), strings.NewReader(news), 4)
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require.NoError(t, err)
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editSize := 0
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for _, e := range edits {
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editSize += len(e.NewText)
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}
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t.Log(edits)
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assert.Less(t, editSize, 100)
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}
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func TestRapid(t *testing.T) {
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rapid.Check(t, func(t *rapid.T) {
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g := rapid.StringMatching("[xy\n]{0,12}")
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olds := g.Draw(t, "olds").(string)
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news := g.Draw(t, "news").(string)
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edits, err := MyersComputeEdits(strings.NewReader(olds), strings.NewReader(news), 4)
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if err != nil {
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t.Fatalf("MyersComputeEdits errored: %v", err)
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}
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actual := gotextdiff.ApplyEdits(olds, edits)
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if actual != news {
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t.Fatalf("Reapplying edits produced %q instead of %q", actual, news)
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}
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})
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}
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